BFT Deimos gate won't close

[MrDiagnostics]

Hi Arthur,

I can't see that the fault can be anything else that a faulty set of photocells.

For the cost, is replace them.

Have you had a look online for a replacement set? Could always buy them, try them out (keep the packaging etc and in good condition, if it doesn't work, send the product back for a refund?